重载作用下沥青路面受力及损坏机理分析

Analysis on Stress and Damage Mechanism of Asphalt Pavement under Heavy-duty Action

以BISAR为工具,采用双圆垂直均布荷载作用下的多层弹性体系理论,分析了各级轴载作用对沥青路面各结构层拉应力与剪应力的影响。从力学响应结果来看,在路面整体结构中,存在两个"高应力"区。基于此,提出在考虑重载作用的影响时,基层材料应选用抗疲劳性能好的材料。重载交通对路面各结构层的力学响应,供道路养护时作为理论依据。

Here ,by using BISAR as a tool and using the multilayer elastic system theory under double-circular and verti-cal uniformly-distributed loads ,the influences of various axle loads on the tensile stress and shear stress of pavement ’s various structure layers were analyzed .From the results of mechanical response ,there exist two “high stress” regions in the pavement structure .Based on this ,it is proposed that considering the effect of heavy duty ,the material with good an-tifatigue performance should be chosen for base material .The mechanical response of the heavy duty traffic on asphalt pavement’s structural layers is proposed here so as to provide the theory basis for road curing .